メタデータ
| 項目 |
値 |
| Designation |
C/1998 Q1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-06-29T12:12:45.789120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
147 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-09-07.0000000 |
| e |
0.99559540 |
| q (au) |
1.577877 |
| a (au) |
358.233578 |
| i (deg) |
32.305811 |
| Ω (om, deg) |
159.784650 |
| ω (w, deg) |
134.732300 |
| M (ma, deg) |
0.010101 |
等級
散乱 + 全体線形
$$
M_a = (16.841 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.841 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.819 |
| k |
0.987 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:27:48.18 |
-05:10:02.0 |
HIP 30761 |
1.00 |
| 2026-06-01 12:00 |
06:27:50.36 |
-05:09:55.7 |
HIP 30761 |
0.65 |
| 2026-06-02 00:00 |
06:27:52.56 |
-05:09:49.5 |
HIP 30761 |
0.68 |
| 2026-06-02 12:00 |
06:27:54.77 |
-05:09:43.5 |
HIP 30761 |
1.07 |
| 2026-06-03 00:00 |
06:27:56.98 |
-05:09:37.5 |
HIP 30761 |
1.56 |
| 2026-06-03 12:00 |
06:27:59.20 |
-05:09:31.7 |
HIP 30761 |
2.10 |
| 2026-06-04 00:00 |
06:28:01.43 |
-05:09:26.1 |
HIP 30761 |
2.64 |
| 2026-06-04 12:00 |
06:28:03.66 |
-05:09:20.6 |
HIP 30761 |
3.19 |
| 2026-06-05 00:00 |
06:28:05.91 |
-05:09:15.2 |
HIP 30761 |
3.75 |
| 2026-06-05 12:00 |
06:28:08.16 |
-05:09:09.9 |
HIP 30761 |
4.31 |
| 2026-06-06 00:00 |
06:28:10.41 |
-05:09:04.8 |
HIP 30761 |
4.88 |
| 2026-06-06 12:00 |
06:28:12.68 |
-05:08:59.8 |
HIP 30761 |
5.45 |
| 2026-06-07 00:00 |
06:28:14.95 |
-05:08:55.0 |
HIP 30761 |
6.01 |
| 2026-06-07 12:00 |
06:28:17.23 |
-05:08:50.3 |
HIP 30761 |
6.59 |
| 2026-06-08 00:00 |
06:28:19.51 |
-05:08:45.7 |
HIP 30761 |
7.16 |
| 2026-06-08 12:00 |
06:28:21.80 |
-05:08:41.3 |
HIP 30761 |
7.73 |
| 2026-06-09 00:00 |
06:28:24.10 |
-05:08:37.0 |
HIP 30761 |
8.31 |
| 2026-06-09 12:00 |
06:28:26.40 |
-05:08:32.9 |
HIP 30761 |
8.89 |
| 2026-06-10 00:00 |
06:28:28.71 |
-05:08:28.9 |
HIP 30761 |
9.46 |
| 2026-06-10 12:00 |
06:28:31.02 |
-05:08:25.0 |
HIP 30761 |
10.04 |
| 2026-06-11 00:00 |
06:28:33.34 |
-05:08:21.2 |
HIP 30761 |
10.62 |
| 2026-06-11 12:00 |
06:28:35.67 |
-05:08:17.6 |
HIP 30761 |
11.21 |
| 2026-06-12 00:00 |
06:28:38.00 |
-05:08:14.2 |
HIP 30761 |
11.79 |
| 2026-06-12 12:00 |
06:28:40.34 |
-05:08:10.9 |
HIP 30761 |
12.37 |
| 2026-06-13 00:00 |
06:28:42.68 |
-05:08:07.7 |
HIP 30761 |
12.96 |
| 2026-06-13 12:00 |
06:28:45.02 |
-05:08:04.7 |
HIP 30761 |
13.55 |
| 2026-06-14 00:00 |
06:28:47.37 |
-05:08:01.8 |
HIP 30761 |
14.13 |
| 2026-06-14 12:00 |
06:28:49.73 |
-05:07:59.0 |
HIP 30761 |
14.72 |
| 2026-06-15 00:00 |
06:28:52.09 |
-05:07:56.4 |
HIP 30761 |
15.31 |
| 2026-06-15 12:00 |
06:28:54.45 |
-05:07:53.9 |
HIP 30761 |
15.90 |
| 2026-06-16 00:00 |
06:28:56.82 |
-05:07:51.6 |
HIP 30761 |
16.49 |
| 2026-06-16 12:00 |
06:28:59.19 |
-05:07:49.4 |
HIP 30761 |
17.08 |
| 2026-06-17 00:00 |
06:29:01.57 |
-05:07:47.3 |
HIP 30761 |
17.67 |
| 2026-06-17 12:00 |
06:29:03.95 |
-05:07:45.4 |
HIP 30761 |
18.27 |
| 2026-06-18 00:00 |
06:29:06.33 |
-05:07:43.7 |
HIP 30761 |
18.86 |
| 2026-06-18 12:00 |
06:29:08.71 |
-05:07:42.0 |
HIP 30761 |
19.45 |
| 2026-06-19 00:00 |
06:29:11.10 |
-05:07:40.5 |
HIP 30761 |
20.05 |
| 2026-06-19 12:00 |
06:29:13.49 |
-05:07:39.2 |
HIP 30761 |
20.64 |
| 2026-06-20 00:00 |
06:29:15.88 |
-05:07:38.0 |
HIP 30789 |
21.22 |
| 2026-06-20 12:00 |
06:29:18.28 |
-05:07:36.9 |
HIP 30789 |
21.67 |
| 2026-06-21 00:00 |
06:29:20.68 |
-05:07:36.0 |
HIP 30789 |
22.13 |
| 2026-06-21 12:00 |
06:29:23.08 |
-05:07:35.2 |
HIP 30789 |
22.59 |
| 2026-06-22 00:00 |
06:29:25.48 |
-05:07:34.6 |
HIP 30789 |
23.07 |